Orson w



. BENNETT.

PRESSURE EEGUEATOE EOE GAS MACHINES.

Patented Mar. 27, 1.888.

witwassen,

N. PETERS. Plwmuxhugnphu, wnwngion, D. c

llaman dramas Farrar Ormes,

ORSON lV. BENNETT, OF VASHINGTON, DISTRICT OF COLUMBIA.

PRESSURE-REGULATOR FOR GAS=MKACHNESu SPECIFICATION forming part ofLetters Patent No. 380.273, dated March 27, 1888.

Application filed August 4, 1587. Serial No. 246,149. (No model.)

To @ZZ whom t may concern:

Beitknown that I, ORsoN W. BENNETT, a citizen -ol' the United States,residing at Washingtou, in the District of Columbia, have invented newand useful Improvements in Pressure-llegulators for Gas-Machines, ofwhich the following is a specification.

I have improved the pressure-regulator for gas in which a dexiblediaphraginis employed With a valve l'or insuring the transmission of auniform dow of gas of a determined pressure to the burners; and theobjects of my improvements are to provide for increasing the durabilityof the diaphragm, to providea cover for preventing the eva-poration ofthe lubricant for the diaphragm, and to increase the efiiciency anddurability of construction. These objects I attain in the manner which lwill now proceed to describe, reference being had to the accompanyingdrawings, in Which- Figure l exhibits a vertical section of my improvedgas-regulator. Fig. 2 shows a modiiication' of the same.

The diaphragm-containing chamber may be of anysuitable form and size;but I prefer to have the casing c made with a removable top section, l,for convenient access to the diaphragm.

The base-section c is provided with a central inlet-coupling, d, forconnection with the meter outlet-pipe di, and an outlet chamber or pipe,e, for connection with the burner-pipes, While the pressure-chamberforming section f has the icxible diaphragm g confined to its bottoniplate centrally over the inlet between vertical plates gi, so as topermitit to rise and fall with its valve la, the stem of which isoonnected centrally with said diaphragm. The valve is preferably ofconical form and has its seat i in the inlet-coupling d, which is alsoprovided with aguide, j, for the stem. The valvestem passes through thediaphragm to receive the loading Weights k, for obtaining a balancingadjustment ofthe valve. The diaphragm is clamped to the valve-stem byplates m, and

has a vertical movement to permit the seating ofthe valve should thepressure of the gas become great enough.

The inlet-.coupling has a vertical tubular eX tension, a, which passesup through the outlet-pipe and enters the pressure-chamber f, so as toform a curb around the inlet-opening above the valve-seat, and thuscollect the tar and moisture Within the outlet-pipe above the valve, sothat the action ofthe latter cannot become clogged and interfered Withby surface collections or the drippings of tar sediment upon thevalve-seat Walls.

Around the fixed edge and exterior to the diaphragm is an annularreceptacle, r, for a lubricant for the diaphragm, which is thereby keptin a soft flexible condition. This lubricant need not entirely cover thediaphragm, because the latter Will absorb it by capillary attraction,and thereby prevent the bad effects resulting from drying and cracking.I

' provide a further protection for the diaphragm by means of a cover, s,which dips into and is sealed in the lubricant and excludes the directcontact of the air. This cover may be stiff, as in Fig. 1, or licxible,as in Fig. 2, the latter construction giving the ad vantage of beingfree to rise and fall with the valve, the stem of which may or may notpass through it. In Fig. .l the valve stem passes up through saidsealing-cover and rises and falls with the valve independent of saidcover. This sealing-cover permits the top case section to be removed toreplenish the lubricant without exposing the diaphragm to the directContact of the atmosphere, and, in connection with the lubricant,preserves the diaphragm in soft condition for easy movement with thevalve. As in Fig. l, thecover also forms a seal for the lubricant andprevents it from evaporatiug and drying, so that its replenishment isless frequent. This sealing-cover is independent ofthe diaphragm, asshown in the drawings.

In practice I found that the unsteady and flickering light waseftectually overcome by providing the valve-stem or the diaphragm With aWeight, 7c', placed at one side of said stern, so as to exert a downwardcanting pressure upon the valve-stem or upon the diaphragm atapoint nearthe circumference of the latter, so as to tend to cant or tilt thevalvestem or its connected diaphragm. For this purpose the loading ofthe valve maybe by a crank-arm, u, outside of the sealing-cover, or byWeights centrally placed upon the valve- ICO stern and upon thediaphragm at one side of its valve-stem.

The tar-chamber c is formed below the pressure-chamber, so thatthecollection of moisture therein drips down into said chamber, from whenceit may be removed by a plug, t; and were it not for this provision thevalve would soon become coated and clogged with a resinons deposit.

As a lubricant I prefer to use glycerine, and 'when the diaphragm-coveris used also as a cover for the lubricant it forms a cover for theannular space fr, as shown in Fig. l.

The diaphragm is re-enforced by the usual clamp-plates for attachment tothe valvestem,

While the plates for confining it to the bottom of the case are made ofunequal height, the in ner one being of the greatest height and turnedout to present a rounded surface to the leather and form a groove, w, toretain any lubricant that may pass through or under the lower edge ofthe diaphragm.

I prefer to prepare the diaphragm with some penetrating softeningmaterial to render it impervious-such as a compound of talloW, neatsfootoil, and glycerine-and it may be coated with bronze-powder to protectthe leather and render it impervious to gas.

It will be understood that the tar and moisture gathers in the pipesleading to the burners, and

will run down into the chamber c and be confined therein by the guard a,over Whichvthe gas passes to the pipe e.

I claim- 1. In a gas-pressure regulator, the combination of a flexiblediaphragm, a sealing-Huid, and a cover for the latter, covering also thediaphragm sealed by said uid,.as set forth.

2. In a pressureregulatolgthe chamber forming case a b, containing asealing-Huid, a dexible diaphragm forming the pressure-chamber, and asealing-cover placed around and-independent of the diaphragm,substantially as described, for the purpose specied.

3. A pressure-regulator for gas, consisting of a flexible diaphragmforming a pressurechamber, a sealing-uuid, a valve connected with andcontrolled by said diaphragm, a protecting-covering for said diaphragm,and an inclosing case having the valve controlled inlet, and an outlethaving a tar and moisture collecting trap, all arranged as shown anddescribed.

In testimony whereof I have hereunto set my hand in the presence of twosubscribing Witnesses.

ORSON YV. BENNETT.

Witnesses:

A. E. H. J oHNsoN,

WM. R. MACKRILLE.

